Parkinson's disease (PD) is a chronic neurodegenerative movement disorder affecting the (extrapyramidal) motor system, characteristically manifesting as bradykinesia, rigidity, tremor and postural instability. Although non-motor symptoms such as behavioural abnormalities, dysautonomia, sleep disturbances and sensory dysfunctions are also common and are quite disabling manifestations of the disease. PD is most commonly seen in the elderly, but is also found in the young people.Indeed, it is a multi-system disorder in which other organs are involved. This book comes to shed light on the complications of PD in general, and on the gastrointestinal complications in specific, with emphasis on the surgical interventions.